sr misses under load

[sbanzer123]

i just put my car on the road yesterday. its a s14 with a s14 sr20 pretty much stock besides a front mount and an exhaust. im running stock boost off the wastegate spring. it ran fine yesterday but just today it starting missing when i get under a load. i can ease into the throttle and it will build boost put if i hammer the gas it will go for a second then just die right down in a terrible miss. any help will be greatly appreciated.

[myzislow]

check your plugs, if your running to rich they tend to foul.

[sbanzer123]

i checked my plugs out everything looks good. i went through and unplugged the coilpacks one at a time and went and did a pull to see if maybe i had a coilpack go bad. i have no idea what else it could be.

[sliEighty]

boost leak... even the smallest will make it do this i had the same problem

[sbanzer123]

it seems like if im doin like 30 and i have it in 4th and i get on the gas it will pull good without missing.

[skylindrftr]

Do a leakdown test, get a tire valve, plug it in a vacuum line, get an air compressor with a tire inflater tool, put it at tdc (second notch from the left on the crank pulley lines up with the needle) and put pressure in the system. If you hear any hissing there's your leak, also spray wd40 or soapy water on the suspicious places. If you have a boost gauge you can test how long it takes for the air to leak out of the system which can tell you how bad it is leaking. Oh and don't forget to plug the turbo inlet!